Hydraulic press.



L. D. WHlTNEY.

HYDRAULIC PRESS.

APPLICAHON FILED ocT.3.1911.

l $69369 Patented June18, l9l8.

' 3 $HEET$-SHEET l.

IN VEN TOR.

A TTORNE Y5.

L. D. WHlTNEY.

HYDRAULIC PRESS.

APPLICATION FILED 0cT.3,19n.

WITNESS:

A TTORNE YS.

L. D. WHITNEY.

HYDRAULIC PRESS. APPLICATION men ocna. 1912.

Patented June 18, 1918.

3 SHEETS-SHEET 3- A TTOR NE YS.

LESLIE DENMAN WHITNEY, OF SAN MATEO, CALIFORNIA.

HYDRAULIC PRESS.

Specification of Letters Patent.

Patent-ea June is, rare.

Application filed October 3, 1917. Serial No. 194,634.

To all whom it may concern:

Be it known that I, LEsLIE DENMAN VVIIITNEY, a citizen of the UnitedStates, residing at San Mateo, in the county of San Mateo and State ofCalifornia, have invented certain new and useful Improvements inHydraulic Presses, of which the following is a specification.

My invention relates to the class of hy draulic presses especiallyadapted for compressing granular or finely comminuted material such, forexample, as common salt, into small, hard bricks.

The object of my invention is, briefly stated, to save time both in thepressing of the brick and in its ejection from the pressure chamber.

To this end, my invention consists in the novel press which I shallhereinafter fully describe, by reference to the aecoi'npanying drawings,in which Figure 1 is a front elevation of my press, partly in section.

Fig. 2 is a side elevation of the same viewed from the left of Fig. 1.

Fig. 3 is a side elevation from the right of Fig. 1.

1 are frame-rods, upon which, at about their middle, is rigidly fixedthe pressurechamber member 2, consisting of a plate with the chamber 3in which the product is compressed.

Carried by the lower ends of the framerods 1 is the hydraulic-pressurecylinder 4:, in which operates the ram 5, through a gland packing at 6.

Upon the frame rods is slidably mounted the head 7, which head isslidably associated with the ram 5, by being telescopically capped uponit, as shown in Fig. 1. On this head 7 is mounted the plunger 8 whichenters the pressure chamber 3 from below.

Upon the frame rods is also slidably mounted a head 9, which carries aplunger 10 which .passes into and out of the pressure chamber 3 fromabove. The head 9 is operated by means of a toggle lever 11, the lowermember of which is secured to the head and the upper member is securedto a fixed cross head 12 of the frame.

The toggle lever 11 is alternately flexed and straightened by means ofconnecting rods 13, the outer ends of which are connected to the crosshead 14 ofthe piston rod 15 of a steam cylinder 16, carried by aframebracket 17.

18, in Fig. 1, is an adjustable stop against whlch the toggle lever 11is straightened.

On top of the frame is carried a steam cylinder 19, to the piston crosshead 20 ofwhich are secured the upper ends of connecting rods 21, thelower ends of said rods being connected to the sliding head 7 which isassociated with the ram of the hydraulicpressure cylinder.

Before indicating the steam and water connections, it will be well, atthis point, to describe the operation of the machine.

Steam being admitted to the cylinder 16, the toggle lever 11 is flexedto the left, thereby lifting the head 9 and upper plunger 10, until saidplunger leaves and fully exposes the top of the pressure chamber 3. Intothis chamber the material is placed, and lies upon the lower plunger 8which, at this time, forms the floor of the chamber.

Then steam being again admitted to the cylinder 16 to move its piston inthe other direction, the toggle lever 11 is straightened out, with theeffect of moving the plunger 11 down into the pressure chamber and uponthe material therein. The pressure thus initially imposed is relativelyrapid and is sufiicient to reduce the product to such density as may beinitially required. This pressure, from the nature of the material, thuspreliminarily and rapidly effects the reduction of the product ingreater part. Thereupon, while said pressure is continued, water isadmitted to the pressure cylinder 1, with the effect of raising the ram5, the sliding head 7 and the plunger 8, the latter thus giving thefinal compression to the product. This final compression thoughrelatively slow is strong enough to give to the product the requiredcompression, which, in practice, reduces such material as salt to aclensity comparable to that of marble. \Vhen the toggle lever 11 isstraightened out, it is locked against linear pressure and issuii'iciently strong to resist the great pressure of hydraulicallyoperated plunger 8 in giving the final compression.

Now instead of using the relatively slowmoving hydraulic ram 5 to effectthe ejection of the compressed product, I move the plunger 8 upwardly byindependent and more rapid means, as follows:-

When the compression is complete, the upper plunger 10 is lifted by itssteam cylinder connections, to clear the'pressure chamber; and thenwhile the ram 5 slowly moves down, steam is admitted to the secondcylinder 19 with the effect, through the connect ing rods 21, ofrapidly. lifting the sliding head 7 and its plunger 8, said head slidingup on the ram 5. The plunger 8 thus passes rapidly up into the pressurechamber and ejects the compressed product. Thereupon the plunger 8 isreturned to its initial position With its head 9 resting on the returnedram 5. Then fresh material is placed in the chamber 3 and the operationsare repeated.

The operating connections here indicated are as follows 22 is thecontrol lever for the hydraulic connections. This operates through avalve chamber 22 shown clearly in Fig. 3, and the pipes 28 and 2%connecting with the hydraulic cylinder 4. 25 and 26 in Figs. 2 and 3 arethe steam pipes whichlead to a valve chamber 27, controlled by a lever28; and from this valve chamber lead the pipes 29 and 30 to the ejectioncylinder 19.

Branch pipes 31 and 32 from the steam pipes 25 and 26, lead to a valvechamber 33 controlled by a lever 3st; and from this valve chamber leadthe pipes 35 and 36 to the steam cylinder 16, as seen in Fig. 2.

I claim v 1. A press comprising a member with a pressure chamber; aplunger operating in said chamber from one direction; steam pressureconnections including a toggle lever for operating said plunger, toeffect the initial pressure; a second plunger operating in said chamberfrom the opposite direction; and hydraulic pressure connections foroperating said second plunger to effect the final pressure. j

2. A press comprising a member with a pressure chamber; a plungeroperating in said chamber from one direction; hydraulic pressureconnections to operate said plunger; a plunger movable into and out ofsaid chamber from the opposite direction to compress the materialtherein from said direction, and to expose the chamber for the ejectionof the compressed product and the supply of fresh material; and steampressure connections for operating said last named plunger.

3. A press comprising a member with a pressure chamber; a plungeroperating in said chamber from one direction; hydraulic pressureconnections to operate said plunger; a plunger movable into and out ofsaid chamber from the opposite direction to compress the materialtherein from said direction and toexpose thechamber for the ejection ofthe compressed product and the supply of fresh material; steam pressureconnections for operating said last named plunger; means for ejectingthe compressed Copies of this patent may be obtained for product; andsteam controlled connections for operating said ejecting means.

et. A press comprising a member with a pressure chamber; a plungermovable into and out of said chamber from one side to effect the initialcompression of the product and to expose the chamber for the ejection ofthe compressed product and the supply of fresh material; steam pressureconnections to operate said plunger; a second plunger operating in saidchamber from the opposite side, to effect the final compression of theproduct and to eject the same; hydraulic pressure connections to operatesaid second plunger to effect said final com 'n'ession; and steamcontrolled connections to operate said plunger on its ejection stroke.

5. A press comprising a member with a pressure chamber; a plungermovable into and out of said chamber from one side to effect the initialcompression of the product and to expose the chamber for the ejection ofthe compressed product and the supply of fresh material; steam pressureconnections to operate said plunger; a second plunger operating in saidchamber from the opposite side, to efiect the final compression of theproduct and to eject the same; hydraulic pressure connections includinga reciprocative ram longitudinally slidably associated with said plungerto operate said second plunger to effect said final compression; andsteam controlled connections to operate said plunger on its ejectionstroke.

6. A press comprising a pressure chamber member; a plunger operatingtherein from one side to eifect the initial compression of the product;a steam-cylinder having a piston with a rod; a toggle lever connectionbetween said rod and plunger; a second plunger operating in the chamberfrom the opposite side, to efi'ect the final compression of the product;and hydraulic pressure connections to operate said second plunger.

7. A press comprising a pressure-ehamber member; means for efiecting theinitial pressure of the product from one direction; a2 plunger foreffecting the final pressure from the opposite direction; ahydraulically operated ram longitudinally slidably associated with saidplunger; a steam cylinder, with piston connections; and rods from saidconnections to the plunger to move the latter to eject the compressedproduct.

In testimony whereof I have signed my name to this specification inv thepresence of two subscribing witnesses.

LESLIE DENMAN WHITNEY.

Witnesses:

WM. F. BOOTH, D. B. Rrormnns.

Washington, I). G.

